LONG-LAT Coordinate system unsuitable for output error

[Olly Betts]

On Thu, Sep 02, 2021 at 11:47:54PM +0100, Olly Betts wrote:
> This restriction on the coordinate system being a metre grid is only for
> the *output* coordinate system.
> 
> You can use `LONG-LAT` (or pretty much any other coordinate system -
> the only restriction is really that PROJ supports it) as the *input*
> coordinate system which is used for fixed points, and Survex will
> convert them to the output coordinate system for you.

I should probably also make it clear that fixed points don't have to all
be specified in the same coordinate system as each other.

Cheers,
    Olly